An asynchronous film coating method and apparatus

Abstract

This invention discloses an asynchronous lamination method and apparatus, belonging to the field of thin film lamination technology. The method is based on an asynchronous collaborative architecture of intermittent feeding driven by a grooved wheel mechanism and continuous delivery of the release film. It acquires the rotation angle signal of the driving wheel in real time and calculates the motion phase and rest phase of the driven wheel based on the geometric relationship of the grooved wheel transmission. Within the precise time window corresponding to the rest phase, the cutting roller is triggered to complete the cutting and pressing of the double-sided adhesive substrate. Simultaneously, based on the phase calculation results, the tension adjustment components on both sides of the cutting roller are fed forward for control. Before the motion phase, the tension roller is driven to swing in the unloading direction to absorb the acceleration tension impact; during the rest phase, the tension roller is driven to swing in the tension-increasing direction to ensure the substrate is taut and stable during cutting. This invention achieves precise phase-level synchronization between the cutting action and the intermittent feeding rhythm, eliminating the inherent tension fluctuations of intermittent start-stop operations. Double-sided adhesive can be cut compactly without gaps, significantly improving material utilization and greatly enhancing lamination accuracy and production stability.

Description

Technical Field

[0001] This invention belongs to the field of thin film coating technology, specifically relating to an asynchronous coating method and apparatus based on intermittent transmission of a grooved wheel and phase coordinated control. Background Technology

[0002] In the field of film lamination processing, such as double-sided tape, flexible printed circuits, and die-cut products, it is usually necessary to cut the double-sided adhesive substrate into segments at a certain pitch and then attach them to a continuously conveyed release film. Traditional lamination equipment generally adopts a working mode of synchronous conveying of upper and lower layers of materials, with the double-sided adhesive substrate and the release film moving continuously at the same speed. Since the double-sided adhesive substrate must be cut while in motion, a fixed gap must be reserved between the two segments to avoid them sticking or pulling together after cutting. This results in low utilization of double-sided adhesive raw materials and insufficient long-term production economy.

[0003] To save raw materials, the industry has developed laminating devices using intermittent conveying, where the upper layer of double-sided adhesive substrate is conveyed by stepping while the lower layer of release film is conveyed continuously, attempting to eliminate gaps by cutting while the double-sided adhesive is stationary. However, existing intermittent laminating devices still have significant shortcomings: First, the intermittent feeding and cutting actions are mostly driven by independent motors, lacking precise synchronization with the phase characteristics of the intermittent mechanism. This often results in problems such as "cutting before the material has come to a complete stop" or "cutting only after the material has started moving," causing dimensional deviations, skewed adhesive segments, or even incomplete cuts. Second, the double-sided adhesive substrate is subjected to acceleration impact during intermittent start-stop processes, causing a sudden increase or loosening of tension, leading to wrinkles, misalignment, and poor adhesion. Third, tension adjustment is mostly passive mechanical roller adjustment or constant tension, lacking feedforward compensation linked to the intermittent phase, and unable to actively suppress tension fluctuations during start-stop operations.

[0004] Therefore, there is an urgent need for an asynchronous lamination method and apparatus that can organically coordinate intermittent feed phase, cutting sequence and tension control, so as to improve cutting accuracy, bonding quality and operational stability while ensuring compact cutting and saving raw materials. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an asynchronous lamination method and apparatus. Its core lies in using the phase calculation of the intermittent grooved wheel mechanism as the control hub to achieve precise coordination among four elements: continuous delivery of release film, intermittent feeding of double-sided adhesive, synchronous cutting of cutting rollers, and tension feedforward adjustment. This significantly improves the accuracy and stability of the lamination process based on existing mechanical structures.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an asynchronous coating method, implemented based on an asynchronous coating device, the device comprising a conveying mechanism, a cutting roller, a tension adjusting component, and a material roll roller; the conveying mechanism comprising a driving component, a driving wheel driven by the driving component, a driving lever disposed on the driving wheel, a driven wheel with a plurality of driven grooves on its outer periphery, and a conveying roller connected to the driven wheel; the device specifically comprises a vertical plate, a conveying plate fixedly connected to the vertical plate, a conveying mechanism, a cutting roller, a tension adjusting component, and a material roll roller; the conveying mechanism comprising a conveying motor, a driving wheel driven by the conveying motor, a driving rod and a driving lever disposed on the driving wheel, a driven wheel with a plurality of driven grooves on its outer periphery, and a conveying roller connected to the driven wheel; the method comprises the following steps: Continuous conveying step: The release film is continuously and uniformly conveyed on the surface of the conveyor plate at a first speed v1 under external traction; Intermittent feeding step: The conveying motor drives the driving wheel to rotate continuously, and the driving block periodically moves into the driven groove, causing the driven wheel and the conveying roller to periodically switch between the motion phase and the rest phase, so that the double-sided adhesive substrate is intermittently fed with the conveying roller; Phase calculation steps: Real-time acquisition of the rotation angle signal of the driving wheel, calculation of whether the driven wheel is currently in the moving phase or the stationary phase based on the geometric relationship of the Geneva drive, and determination of the start and end times of the stationary phase time window; Synchronous cutting step: Drive the cutting roller to rotate within the pause phase time window, so that the moment when the blade of the cutting roller cuts the double-sided adhesive substrate is within the time window, and press down the cut adhesive segment at the same time as cutting, so that the adhesive segment adheres to the surface of the release film in continuous conveying. Tension feedforward adjustment steps: Based on the phase calculation results, the tension adjustment components located on both sides of the cutting roller are fedforward controlled: Before the start of the motion phase, the tension roller is driven to swing at a first angle in the unloading direction to absorb the sudden increase in tension caused by the accelerated feeding of the double-sided adhesive substrate; after entering the rest phase, the tension roller is driven to swing at a second angle in the tension increasing direction to keep the double-sided adhesive substrate taut and stable during cutting.

[0007] Furthermore, in the phase calculation step, the rotation angle signal is acquired by the encoder built into the conveyor motor, or obtained by the position detection element installed on the vertical plate by detecting the circumferential reference mark of the drive wheel; the engagement angle interval [θ1, θ2] between the drive block and the driven groove is determined according to the number n of the driven grooves. When the rotation angle θ of the drive wheel is within the engagement angle interval, it is determined to be a motion phase, and when it is outside the engagement angle interval, it is determined to be a rest phase.

[0008] Furthermore, in the synchronous cutting step, the triggering time of the cutting roller is earlier than the start time of the rest phase by an advance amount t0. The advance amount t0 is set according to the response time required for the cutting roller to contact the double-sided adhesive substrate from the start, so that the cutting time of the blade falls within the effective area of ​​the time window and avoids the window boundary to tolerate phase calculation errors and motor response fluctuations.

[0009] Furthermore, in the intermittent feeding step, the step distance L2 of the double-sided adhesive substrate is determined by the radius r of the conveying roller and the number n of the driven grooves, which is L2 = 2πr / n; in the continuous conveying step, the conveying stroke L1 of the release film within one intermittent period T is L1 = v1 × T; the step distance L2 and the conveying stroke L1 are matched according to the pitch of the bonded product, so that adjacent adhesive segments are arranged sequentially on the release film according to the finished product pitch and are connected to each other without gaps.

[0010] Furthermore, in the tension feedforward adjustment step, the first angle and the second angle are dynamically corrected based on the real-time roll diameter of the unwinding side material roll; the real-time roll diameter is calculated based on the correspondence between the cumulative rotation angle of the unwinding side power motor and the cumulative unwinding length of the double-sided adhesive substrate. As unwinding proceeds, the roll diameter gradually decreases, and the oscillation amplitude is correspondingly reduced to match the change in rotational inertia of the winding system.

[0011] Furthermore, in the tension feedforward adjustment step, the tension adjustment component located on the feed side of the cutting roller oscillates according to the start-stop law of the motion phase to compensate for the acceleration impact of the intermittent start-stop of the double-sided adhesive substrate; the tension adjustment component located on the discharge side of the cutting roller maintains an increased tension state during the rest phase to provide stable winding tension for the cut waste section; the waste section is wound by the winding-side roll roller, and the speed of the winding-side power motor decreases according to a constant linear speed relationship as the real-time roll diameter increases.

[0012] This invention also provides an asynchronous laminating device, including a vertical plate and a conveying plate. The conveying plate is fixedly connected to the vertical plate, and a conveying mechanism is provided on one side of the vertical plate. A release film is provided at the top of the conveying plate. The release film is continuously slidably conveyed on the surface of the conveying plate under external traction. A cutting motor is fixedly connected to the other side of the vertical plate. The output end of the cutting motor passes through the vertical plate and is fixedly connected to a cutting roller. Tension adjusting components are provided on both sides of the cutting roller. The tension adjusting components include a tension adjusting motor, a connecting rod connected to the output end of the tension adjusting motor, and a tensioning roller rotatably connected to the end of the connecting rod. Two power motors are fixedly connected to the same side of the plate as the cutting motor. The output ends of the two power motors pass through the vertical plate and are fixedly connected to material rolls. The conveying mechanism includes a conveying motor, a drive wheel driven by the conveying motor, a drive rod and a drive block provided on the drive wheel, a driven wheel with several driven grooves on its outer periphery, and a conveying roller connected to the driven wheel. The device also includes a controller, which is electrically connected to the conveying motor, the cutting motor, the tension adjusting motor, and the power motor respectively, and is configured to perform the asynchronous coating method as described in any one of claims 1 to 6.

[0013] Furthermore, there are three driven slots, which are arranged in a circular array around the driven wheel.

[0014] Furthermore, the outer surface of the conveying roller is fitted with an anti-slip sleeve.

[0015] Furthermore, the outer surfaces of the two material rolls are jointly wrapped with a double-sided adhesive substrate. One of the material rolls is the unwinding roll before cutting, and the other is the take-up roll after cutting. That is, the two material rolls are respectively configured as an unwinding roll and a take-up roll. The double-sided adhesive substrate is arranged on the underside of the cutting roll, and the cutting and pressing actions are performed synchronously during the rotation of the cutting roll.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention adopts a three-in-one framework of "phase calculation - synchronous cutting - tension feedforward". The motion phase and rest phase of intermittent feeding are used as the time reference for the whole machine control. This ensures that the cutting action is strictly limited to the rest window when the double-sided adhesive substrate is completely stationary. This fundamentally avoids dimensional deviations and adhesive segment skewing caused by cutting during movement, and achieves a compact arrangement of adjacent adhesive segments without gaps. The utilization rate of double-sided adhesive raw materials is significantly improved compared with the traditional synchronous conveying method.

[0017] 2. This invention actively predicts the start and stop times of the double-sided adhesive substrate by real-time calculation of the grooved wheel phase, and performs feedforward control on the tension adjustment components on both sides of the cutting roller. It pre-unloads tension before the moving phase and pre-increases tension before the resting phase, effectively absorbing and compensating for the acceleration impact generated by intermittent feeding. The tension fluctuation of the substrate is significantly reduced, thereby avoiding wrinkles, misalignment and poor bonding.

[0018] 3. This invention can be compatible with different product pitches using the same set of mechanical structures: by adjusting the matching relationship between the first speed v1 of the release film and the period T of the drive wheel, L1=v1×T is made equal to the required pitch, and the step pitch L2=2πr / n is uniquely determined by the radius of the conveyor roller and the number of grooves of the groove wheel. The two can be combined to achieve flexible production without the need to replace the core mechanical components.

[0019] 4. This invention links the rotational speed of the winding-side power motor with the real-time roll diameter, and dynamically reduces the rotational speed according to the constant linear speed principle to ensure stable winding tension of waste material, reduce tension drift caused by increased roll diameter, and improve the consistency of continuous production and finished product yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the invention without the vertical plate; Figure 3 This is a schematic diagram of the driving wheel and driven wheel structure of the present invention; Figure 4 This is a schematic diagram of the cutter roller structure of the present invention.

[0021] In the diagram: 1. Vertical plate; 2. Conveyor plate; 3. Tension adjustment assembly; 31. Connecting rod; 32. Tension roller; 33. Tension adjustment motor; 4. Material roll roller; 41. Power motor; 5. Double-sided adhesive substrate; 6. Cutting roller; 61. Cutting motor; 7. Conveying mechanism; 71. Conveyor roller; 72. Conveyor motor; 73. Driving rod; 74. Driven wheel; 75. Driven groove; 76. Driving block; 77. Driving wheel; 8. Release film. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1 , Figure 2As shown, this embodiment provides an asynchronous coating device, including a vertical plate 1, a conveying plate 2, a conveying mechanism 7, a cutting roller 6, a tension adjusting component 3, and two material roll rollers 4. The conveying plate 2 is fixedly connected to the vertical plate 1 and serves as a continuous sliding support surface for the release film 8; the release film 8 slides continuously and uniformly on the surface of the conveying plate 2 at a first speed v1 under the action of an external traction force.

[0024] Two material rolls 4 are independently driven by their respective power motors 41. One is an unwinding roll and the other is a take-up roll. The double-sided adhesive substrate 5 passes sequentially around the unwinding roll, the conveying roll 71, below the cutting roll 6, and the take-up roll to form a complete double-sided adhesive feeding path. The cutting roll 6 is driven by a cutting motor 61, and a set of tension adjustment components 3 is provided on each of its two sides.

[0025] The tension adjustment assembly 3 includes a tension adjustment motor 33 fixed to the side of the conveyor plate 2, a connecting rod 31 connected to the output end of the tension adjustment motor 33, and a tension roller 32 rotatably connected to the end of the connecting rod 31. By driving the connecting rod 31 to swing through the tension adjustment motor 33, the tension roller 32 can be driven to swing between the unloading direction and the tension increasing direction, thereby changing the tension of the double-sided adhesive substrate 5. It should be noted that, in this paper, the connecting rod 31 of the tension adjustment assembly 3 is rotatably connected to the conveyor plate 2; the conveyor plate 2 is the support and connecting base.

[0026] like Figure 3 As shown, the conveying mechanism 7 adopts a Geneva intermittent transmission structure, including a conveying motor 72, a driving wheel 77, a driving rod 73, a driving block 76, a driven wheel 74, a conveying roller 71, and several driven grooves 75 formed on the outer periphery of the driven wheel 74. The conveying motor 72 drives the driving wheel 77 to rotate continuously, and the driving block 76 periodically moves into the driven grooves 75, causing the driven wheel 74 and the coaxially fixed conveying roller 71 to periodically switch between a moving phase and a resting phase. Preferably, three driven grooves 75 are provided and arranged in a circular array around the driven wheel 74 to obtain a smooth and uniform intermittent indexing motion. The outer surface of the conveying roller 71 is fitted with an anti-slip sleeve to increase the friction with the double-sided adhesive substrate 5 and prevent slippage during intermittent feeding.

[0027] The core innovation of this invention lies in the coordinated control of the above-mentioned device according to five steps: "continuous conveying, intermittent feeding, phase calculation, synchronous cutting, and tension feedforward". The specific implementation of each step is as follows.

[0028] Continuous conveying step: The release film 8 is continuously and uniformly conveyed on the surface of the conveyor plate 2 at a first speed v1, driven by the external traction roller or the downstream winding mechanism. The first speed v1 is set according to the bonding pitch P of the target product and the intermittent period T of the grooved wheel, that is, v1=P / T.

[0029] Intermittent feeding step: The conveyor motor 72 drives the drive wheel 77 to rotate continuously at a constant speed. The drive block 76 rotates with the drive wheel 77 and sequentially moves into the driven slot 75 on the driven wheel 74. Taking the number of driven slots 75 as n=3 as an example, for each revolution of the drive wheel 77, the driven wheel 74 is moved once and rotates 120°. The conveyor roller 71 rotates 120° synchronously, thereby driving the double-sided adhesive substrate 5 forward by one step distance L2. This step distance is determined by the radius r of the conveyor roller 71 as L2=2πr / n. After that, the driven wheel 74 enters the rest phase, and the double-sided adhesive substrate 5 remains stationary.

[0030] Phase calculation steps: The controller acquires the rotation angle signal of the drive wheel 77 in real time. This signal can be obtained directly by the encoder built into the conveyor motor 72, or by the proximity switch installed on the vertical plate 1 detecting the circumferential reference mark on the drive wheel 77. Based on the geometric relationship of the Geneva drive, the engagement angle interval [θ1, θ2] between the drive lever 76 and the driven slot 75 is determined by the number n of the driven slots 75 and the geometry of the lever. When the rotation angle θ of the drive wheel 77 falls into the engagement angle interval [θ1, θ2], it is determined to be a moving phase; when θ is outside this interval, it is determined to be a stationary phase. Thus, the controller can accurately predict the start time t1 and end time t2 of each stationary phase and generate a precise time window [t1, t2].

[0031] Synchronous cutting step: The controller triggers the cutting motor 61 within the time window [t1, t2], driving the cutting roller 6 to rotate. Considering the response time between the cutting motor 61 receiving the trigger signal and the cutting roller 6's blade contacting the double-sided adhesive substrate 5, the triggering time of the cutting motor 61 is set to t1−t0, where the advance amount t0 is calibrated according to the mechanical response characteristics of the cutting motor 61 and the cutting roller 6. The moment tc when the blade cuts the double-sided adhesive substrate 5 is controlled to fall in the middle region of [t1, t2], thus completing the cutting while retaining sufficient phase margin. While cutting the double-sided adhesive substrate 5, the cutting roller 6 continues to press down, pressing the cut adhesive segment onto the surface of the continuously moving release film 8 below, realizing the "cutting-bonding" process in one step.

[0032] Tension feedforward adjustment steps: Based on the phase calculation results, the controller performs feedforward control on the tension adjustment components 3 on both sides of the cutting roller 6. Specifically, just before the start of the motion phase, the controller drives the feed-side tension roller 32 to swing at a first angle α1 in the unloading direction, so that the double-sided adhesive substrate 5 is in a slightly relaxed state before accelerated feeding, in order to absorb the sudden increase in tension caused by the feeding acceleration; after the end of the motion phase and the start of the rest phase, the controller drives the tension rollers 32 on both sides to swing at a second angle α2 in the tension-increasing direction, so that the double-sided adhesive substrate 5 quickly returns to a taut state, ensuring that the adhesive material is flat and without deviation during cutting. The discharge-side tension roller 32 maintains an increased tension state during the rest phase, providing continuous tension for the stable winding of the waste section.

[0033] Furthermore, the first angle α1 and the second angle α2 are not fixed values, but are dynamically corrected based on the real-time roll diameter of the unwinding side roll 4. During unwinding, the roll diameter gradually decreases, and the rotational inertia of the winding system changes accordingly, resulting in a change in tension for the same swing angle. The controller estimates the current roll diameter in real time based on the relationship between the cumulative rotation angle of the unwinding side motor 41 and the cumulative unwinding length of the double-sided adhesive substrate 5, and adjusts the swing angle amplitude accordingly to maintain consistent tension control across the entire roll diameter range.

[0034] The take-up side roll 4 is also driven by the power motor 41. To achieve constant linear speed take-up of the waste section, the controller dynamically reduces the speed of the power motor 41 according to the real-time roll diameter on the take-up side and the principle of constant linear speed. The real-time roll diameter is calculated based on the relationship between the cumulative rotation angle of the take-up motor and the cumulative length of the wound waste, thereby avoiding the drift of the take-up tension caused by the increase of the roll diameter.

[0035] The following describes the working process of this embodiment in conjunction with specific process parameters, so as to understand the control logic of the present invention.

[0036] Assuming the number of driven grooves 75 is n=3, the motion coefficient of the grooved wheel is k=(n−2) / (2n)=1 / 6, meaning that in one intermittent cycle T, the motion phase accounts for 1 / 6, and the resting phase accounts for 5 / 6. If the rotational speed of the driving wheel 77 is 30r / min, then the intermittent cycle T=2s, the motion phase duration Tm≈0.333s, and the resting phase duration Tr≈1.667s. When the radius of the conveyor roller 71 is r=30mm, the step distance L2 of the double-sided adhesive substrate 5 is L2=2πr / n≈62.83mm.

[0037] To achieve seamless and compact bonding, the target product pitch P is set to 62.83 mm. Therefore, the first velocity of the release film 8 is v1 = P / T ≈ 31.42 mm / s. Under this condition, the release film 8 moves exactly one pitch within each cycle T, while the double-sided adhesive substrate 5 is cut and bonded with a 62.83 mm long adhesive segment within each cycle, with adjacent adhesive segments seamlessly connected end-to-end without any redundant gaps.

[0038] The response time of the cutting motor 61 is calibrated to 0.15s, so the advance t0 is 0.15s. 0.15s before the drive wheel 77 enters the engagement angle interval, the controller starts counting down; when the angle θ crosses the engagement interval and enters the rest phase area, the cutting motor 61 has already started, and the cutting roller 6 blade contacts the double-sided adhesive substrate 5 about 0.1s after the start of the rest phase. The cutting time tc is located in the first part of the window [t1, t2], leaving a stable rest time of about 1.4s, which is sufficient to ensure the smooth completion of the cutting and bonding actions.

[0039] The tension feedforward curve can be pre-stored in the controller: 0.1s before the start of the motion phase, the feed-side tension roller 32 swings smoothly at +8° to enter the unloading position; 0.05s before the start of the rest phase, the tension rollers 32 on both sides swing back to the -5° tension-increasing position. If the current unwinding diameter decreases from the initial 120mm to 60mm, the controller will adjust the swing angle amplitude to approximately 50% of the original according to the roll diameter ratio to maintain the same tension compensation effect.

[0040] During operation, the release film 8 slides continuously and at a constant speed on the surface of the conveyor plate 2 under external traction; the power motor 41 drives the unwinding roller to release the double-sided adhesive substrate 5, while the rewinding roller rewinds the cut waste material. The conveyor motor 72 drives the drive wheel 77 to rotate continuously, and the drive lever 76 periodically moves the driven wheel 74, causing the conveyor roller 71 and the double-sided adhesive substrate 5 to move intermittently.

[0041] The controller calculates the rotation angle of the drive wheel 77 in real time, predicting the precise window for each pause phase. Before the window arrives, the cutting motor 61 is triggered in advance, ensuring that the cutting roller 6's blades complete the cutting and pressing of the double-sided adhesive substrate 5 while it remains stationary. Simultaneously, the tension regulating motor 33, based on the phase calculation results, performs feedforward oscillation on the tension roller 32, unloading tension during the movement phase and increasing tension during the pause phase, dynamically adjusting the oscillation angle amplitude according to the unwinding roll diameter. This entire work cycle repeats continuously, achieving efficient, precise, and low-loss asynchronous lamination processing.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An asynchronous coating method, characterized in that, The method is implemented based on an asynchronous coating device, which includes a conveying mechanism, a cutting roller, a tension adjusting assembly, and a material roll roller. The conveying mechanism includes a driving component, a driving wheel driven by the driving component, a driving block disposed on the driving wheel, a driven wheel with several driven grooves on its outer periphery, and a conveying roller connected to the driven wheel. The method includes the following steps: Continuous conveying step: The release film (8) is continuously and uniformly conveyed on the surface of the conveying plate (2) at a first speed v1 under external traction; Intermittent feeding step: The conveying motor (72) drives the driving wheel (77) to rotate continuously, and the driving block (76) periodically pushes into the driven groove (75), driving the driven wheel (74) and the conveying roller (71) to periodically switch between the motion phase and the rest phase, so that the double-sided adhesive substrate (5) is intermittently fed with the conveying roller (71); Phase calculation steps: Real-time acquisition of the rotation angle signal of the driving wheel (77), calculation of the current motion phase or rest phase of the driven wheel (74) based on the geometric relationship of the Geneva drive, and determination of the start and end times of the rest phase time window; Synchronous cutting step: Drive the cutting roller (6) to rotate within the pause phase time window, so that the moment when the blade of the cutting roller (6) cuts the double-sided adhesive substrate (5) is within the time window, and press down the cut adhesive segment at the same time as cutting, so that the adhesive segment adheres to the surface of the release film (8) in continuous conveying. Tension feedforward adjustment steps: Based on the phase calculation results, the tension adjustment components (3) located on both sides of the cutting roller (6) are fed forward for control: Before the start of the motion phase, the tension roller (32) is driven to swing at a first angle in the unloading direction to absorb the sudden increase in tension caused by the accelerated feeding of the double-sided adhesive substrate (5); after entering the rest phase, the tension roller (32) is driven to swing at a second angle in the tension increasing direction so that the double-sided adhesive substrate (5) remains taut and stable during cutting.

2. The asynchronous coating method according to claim 1, characterized in that, In the phase calculation step, the rotation angle signal is acquired by the encoder built into the conveyor motor (72), or by the position detection element installed on the vertical plate (1) detecting the circumferential reference mark of the drive wheel (77); the engagement angle interval [θ1, θ2] between the drive block (76) and the drive groove (75) is determined according to the number n of the driven groove (75). When the rotation angle θ of the drive wheel (77) is within the engagement angle interval, it is determined to be a motion phase, and when it is outside the engagement angle interval, it is determined to be a rest phase.

3. The asynchronous coating method according to claim 1, characterized in that, In the synchronous cutting step, the triggering time of the cutting roller (6) is earlier than the start time of the rest phase by an advance amount t0. The advance amount t0 is set according to the response time required for the cutting roller (6) from start to contact the double-sided adhesive substrate (5), so that the cutting time of the blade falls within the effective area of ​​the time window and avoids the window boundary to tolerate phase calculation error and motor response fluctuation.

4. The asynchronous coating method according to claim 1, characterized in that, In the intermittent feeding step, the step distance L2 of the double-sided adhesive substrate (5) is determined by the radius r of the conveying roller (71) and the number n of the driven groove (75) as L2=2πr / n; in the continuous conveying step, the conveying stroke L1 of the release film (8) in one intermittent period T is v1×T; the step distance L2 and the conveying stroke L1 are matched according to the pitch of the bonded product, so that adjacent adhesive segments are arranged sequentially on the release film (8) according to the finished product pitch and are connected to each other without gaps.

5. The asynchronous coating method according to claim 1, characterized in that, In the tension feedforward adjustment step, the first angle and the second angle are dynamically corrected according to the real-time roll diameter of the unwinding side material roll (4); the real-time roll diameter is calculated based on the correspondence between the cumulative rotation angle of the unwinding side power motor (41) and the cumulative unwinding length of the double-sided adhesive substrate (5). As unwinding proceeds, the roll diameter gradually decreases, and the swing amplitude is reduced accordingly to match the change in rotational inertia of the winding system.

6. The asynchronous coating method according to claim 1, characterized in that, In the tension feedforward adjustment step, the tension adjustment component (3) located on the feed side of the cutting roller (6) swings according to the start and stop law of the motion phase to compensate for the acceleration impact of the intermittent start and stop of the double-sided adhesive substrate (5); the tension adjustment component (3) located on the discharge side of the cutting roller (6) maintains an increased tension state within the rest phase to provide stable winding tension for the cut waste section; the waste section is wound by the winding side roll roller (4), and the speed of the winding side power motor (41) decreases according to the constant linear speed relationship as the real-time roll diameter increases.

7. An asynchronous film coating device, comprising a vertical plate (1) and a conveying plate (2), characterized in that, The conveying plate (2) is fixedly connected to the vertical plate (1), and a conveying mechanism (7) is provided on one side of the vertical plate (1). A release film (8) is provided at the top of the conveying plate (2). The release film (8) is continuously conveyed by sliding on the surface of the conveying plate (2) under external traction. A cutting motor (61) is fixedly connected to the other side of the vertical plate (1). The output end of the cutting motor (61) passes through the vertical plate (1) and is fixedly connected to a cutting roller (6). Tension adjustment components (3) are provided on both sides of the cutting roller (6). The tension adjustment components (3) include a tension adjustment motor (33), a connecting rod (31) connected to the output end of the tension adjustment motor (33), and a tensioning roller (32) rotatably connected to the end of the connecting rod (31). The vertical plate (1) is on the same side as the cutting motor (61). Two power motors (41) are fixedly connected to the surface. The output ends of the two power motors (41) pass through the vertical plate (1) and are fixedly connected to the material roll rollers (4). The conveying mechanism (7) includes a conveying motor (72), a drive wheel (77) driven by the conveying motor (72), a drive rod (73) and a drive lever (76) provided on the drive wheel (77), a driven wheel (74) with a plurality of driven grooves (75) on its outer periphery, and a conveying roller (71) connected to the driven wheel (74). The device also includes a controller, which is electrically connected to the conveying motor (72), the cutting motor (61), the tension adjusting motor (33) and the power motor (41) respectively, and is configured to perform the asynchronous coating method as described in any one of claims 1 to 6.

8. An asynchronous coating device according to claim 7, characterized in that, The driven groove (75) is provided in three parts, and the three driven grooves (75) are arranged in a ring array with the driven wheel (74) as the center.

9. An asynchronous coating device according to claim 7, characterized in that, The outer surface of the conveying roller (71) is fitted with an anti-slip sleeve.

10. An asynchronous coating device according to claim 7, characterized in that, The outer surfaces of the two material rolls (4) are wrapped with double-sided adhesive substrate (5). One of the material rolls (4) is the unwinding roll before cutting, and the other material roll (4) is the winding roll after cutting. The double-sided adhesive substrate (5) is arranged on the lower side of the cutting roll (6). The cutting roll (6) performs cutting and pressing actions synchronously during rotation.

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